3. A simple single-zone building is 8m long by 5m wide by 3m high. In the south wall and north wall (8mx5m), there is ea

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3 A Simple Single Zone Building Is 8m Long By 5m Wide By 3m High In The South Wall And North Wall 8mx5m There Is Ea 1 (57.24 KiB) Viewed 10 times

3. A simple single-zone building is 8m long by 5m wide by 3m high. In the south wall and north wall (8mx5m), there is each one big window with the size of 4m x1.5m. The inside design temperature for winter is 18°C. This building is located in Reading, UK, with the outside design air temperature of -2°C. U-values for different elements of this building are listed in Table 1. Element U-value (W/m²K) Window 5.6 Roof 3.0 Floor 1.5 Wall 2.5 Table 1 U-values for different elements in the building (a) Calculate the fabric heat loss for the building. (10 marks) (b) If the same building is located in London, how do the heating load and cooling load change? And why is that? (5 marks) (c) If the heating load is required to reduce 30%, propose the retrofit strategy and calculate the designed U-value for your retrofit strategy. (10 marks)